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Unformatted text preview: Note-A-Rific: X-Rays Uses of X-rays X-Rays, which were discovered by Wilhelm K. Roentgen , have several uses& • They are now most commonly used as a diagnostic tool to make x-ray images. • In some cases they are used to fight some types of cancer. • They are also used to study the crystal structure of solids, since their wavelength is about the same size as the spacing between atoms. • Unfortunately, X-Rays have high enough energies that they can damage and destroy living tissue, so exposure to them must be limited. Producing X-Rays X-Rays are produced when accelerated electrons strike a (typically) metal target. • They can collide with atoms of the material giving up most of their energy as heat (about 99%, so x-ray tubes must be cooled.) and the rest as a photon • The electrons sometimes slam right into the atoms of the material and throw off the x-rays. • Sometimes the electrons just ¡skid¢ past the atoms, moving in a curve& o Since any curved motion is an acceleration, the electron in this...
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This note was uploaded on 02/29/2012 for the course PHYS 227 taught by Professor Rabe during the Fall '08 term at Rutgers.
- Fall '08